HTML Block Merge Tag issue

I’m using Power Boost to help build a simple contract. The contract is pulling fields from a previous form page and populating an HTML Block with the final details.

I’d like for a copy of the contract (HTML Block) to be sent via GF email notifications. Unfortunately, HTML Blocks aren’t sent as part of the {all_fields} merge tag.

I found a code snippet (below) that will add it to the {all_fields} merge tag. The new problem is the emails show the merge tags instead of the final processed output. How do I get email notifications to render merge tags in HTML Blocks?

/**
 * Include HTML Fields in {all_fields} Merge Tag by Default
 **/

add_action( 'gform_merge_tag_filter', function( $value, $tag, $modifiers, $field ) {
	if ( $field->type == 'html' && $tag == 'all_fields' ) {
		$value = $field->content;
	}
	return $value;
}, 10, 4 );

Thanks for your help!